If I’m uncertain, it’s because Ozzy Osbourne’s mumblemouth has become even more pronounced this season on “The Osbournes.”

And since it’s the show’s last go-round, I wish I could understand him better. Other reality shows apply subtitles

to situations where the audio is garbled – which happens often with Ozzy.

It’s too bad because he has emerged as the rock-solid center of the family.

Imagine that – rock’s wild man, Ozzy Osbourne, as the voice of reason. Well, in a family this frazzled someone has to lay down the law.

In this final season of “The Osbournes,” which passed the midway point last Monday, wife Sharon is not the dynamo of old.

Son Jack, 19, still hasn’t learned to recognize the difference between true friends and those who hang around

because he is the son of a rich and famous rock star.

And Kelly? Two weeks ago, her out-of-control partying landed her in rehab. Last week, when she wasn’t fighting

to get out, she was begging over the phone for the delivery of clothes, shoes, a manicurist, even a portable

DVD player.

From what I can dope out, her father – who has plenty of experience himself in the ways of drug rehabilitation

– is better than Sharon at putting his foot down and insisting that Kelly stay the course.

Jack, who celebrated a year of sobriety on last week’s episode, has also been vocal in insisting that his sister

stick it out.

On the show, Kelly’s a train wreck. In real life, she must have sobered up since these episodes were filmed

because she eventually was cast in a lead role on the ABC drama “Life As We Know It.”

Meanwhile, life as we’ve known it on “The Osbournes” is coming to an end.

And since this show has gone from the most talkedabout series of 2002 to the least talked-about show of 2005, I just thought I’d mention that there are only five episodes left until the finale March 21.